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#31
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Towards the *fully* 3D-printed electric cars.
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#33
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Towards the *fully* 3D-printed electric cars.
In sci.physics David Mitchell wrote:
wrote: Does anyone care about a shape optimized 4 slice toaster or filing cabinet? Yes. I do. If any significant number of items in your house are fabricated, it makes sense to use as few raw materials as possible, so, for example, it would make sense to honeycomb the inside of a knife handle, since it would still be strong enough, and would allow you to keep a gram or two of material "in the pot" for other projects. Ditto everything you make. Nonsense; the items in one's house are based on price not how elegantly it was produced. It makes no sense to honeycomb the inside of a knife handle as it would add no functionality and just increase the price. -- Jim Pennino |
#34
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Towards the *fully* 3D-printed electric cars.
In sci.physics Jeff Findley wrote:
In article , says... Landing gear, and all other structural moving parts, is surely another area on aircraft which could use this technology. Landing gear make up a significant percentage of an aircraft's total dry mass, so this would be a likely candidate for shape optimization and 3D printing. Again, you are talking about niche applications and landing gear are not that big a part of an aircrafts weight. From Wikipedia (because I don't have time to look up a "better" source): The undercarriage is typically 4-5% of the takeoff mass and can even reach 7%. That's significant in aerospace. Have you ever looked at the interior structures of an aircraft? Yes, many times. I've got a b.s. in aerospace engineering, so I know the basics. Many of our customers are aerospace, so I have to understand the domain. 3D printing is, and always will be, a niche manufacturing method. Handy at times, but certainly not a world changer. This is quite short sighted. I'm sure the same was said about composites when they were in their infancy. Today it would be quite hard (i.e. likely impossible) to point to something commercial that flies and carries people commercially that has absolutely zero composite content. An irrelevant red herring to the subject of 3D printing. There are a HUGE number of different composite materials out there and it has taken well over half a century for most aircraft to have even a small fraction of composite materials in their construction. Note the word "most". How is an example of the adoption of new materials/manufacturing processes not applicable to 3D printing which is another example of the same thing? Are you deliberately being intellectually dishonest? Well, if you want to compare composite materials and 3D printing, composite materials have been around for over a half century and the usage is still trivial compared to traditional materials in just about all products other than camper shells and ski boats. So we can expect 3D printers to still be niche in 50 years. I can say that shape optimization coupled with 3D printing is one of the "bleeding edge" topics in my industry. It's really no secret, you can surely Google hundreds of articles on the topic. I really can't go into further details, but my profession is in writing engineering software, so I ought to know. Whoopee. It is still niche. You're posting to sci.space groups. It's quite significant to the aerospace industry. If you don't like it, find another group to pester. I didn't choose the groups and it is being posted to other groups as well. In the overall scheme of things, aerospace is a niche industry. Does anyone care about a shape optimized 4 slice toaster or filing cabinet? This isn't sci.toaster. Nor is is sci.niche. Jeff -- Jim Pennino |
#35
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Towards the *fully* 3D-printed electric cars.
Jeff Findley schrieb:
If the "mass were already gone from the design" then GE would not be pouring literally millions of dollars into developing a one meter cubed 3D printer presumably for printing aircraft engine parts. One nice thing about 3D printing is that you can create voids in places you cannot with conventional technologies. This can help a _lot_ when putting in cooling channels (wildly important for turbine manufacturers who always fight for that extra 10 K of maximum temperature to get that extra bit of efficiency), or when you can put in a void where you don't actually need material, and all it would do would be to add mass and/or create thermal stress on heating up or cooling down. |
#36
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Towards the *fully* 3D-printed electric cars.
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#37
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Towards the *fully* 3D-printed electric cars.
wrote:
In sci.physics Jeff Findley wrote: In article , says... Landing gear, and all other structural moving parts, is surely another area on aircraft which could use this technology. Landing gear make up a significant percentage of an aircraft's total dry mass, so this would be a likely candidate for shape optimization and 3D printing. Again, you are talking about niche applications and landing gear are not that big a part of an aircrafts weight. From Wikipedia (because I don't have time to look up a "better" source): The undercarriage is typically 4-5% of the takeoff mass and can even reach 7%. That's significant in aerospace. Have you ever looked at the interior structures of an aircraft? Yes, many times. I've got a b.s. in aerospace engineering, so I know the basics. Many of our customers are aerospace, so I have to understand the domain. 3D printing is, and always will be, a niche manufacturing method. Handy at times, but certainly not a world changer. This is quite short sighted. I'm sure the same was said about composites when they were in their infancy. Today it would be quite hard (i.e. likely impossible) to point to something commercial that flies and carries people commercially that has absolutely zero composite content. An irrelevant red herring to the subject of 3D printing. There are a HUGE number of different composite materials out there and it has taken well over half a century for most aircraft to have even a small fraction of composite materials in their construction. Note the word "most". How is an example of the adoption of new materials/manufacturing processes not applicable to 3D printing which is another example of the same thing? Are you deliberately being intellectually dishonest? Well, if you want to compare composite materials and 3D printing, composite materials have been around for over a half century and the usage is still trivial compared to traditional materials in just about all products other than camper shells and ski boats. Jesus, get back to your trailer park until you gain some experience in the real world. So we can expect 3D printers to still be niche in 50 years. Well, YOU can no doubt expect that, but you're pretty well known for having your head up and locked. I can say that shape optimization coupled with 3D printing is one of the "bleeding edge" topics in my industry. It's really no secret, you can surely Google hundreds of articles on the topic. I really can't go into further details, but my profession is in writing engineering software, so I ought to know. Whoopee. It is still niche. You're posting to sci.space groups. It's quite significant to the aerospace industry. If you don't like it, find another group to pester. I didn't choose the groups and it is being posted to other groups as well. You didn't? Do you not know how your newsreader works, or what? -- "Ignorance is preferable to error, and he is less remote from the truth who believes nothing than he who believes what is wrong." -- Thomas Jefferson |
#38
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Towards the *fully* 3D-printed electric cars.
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#39
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Towards the *fully* 3D-printed electric cars.
In sci.physics Jeff Findley wrote:
In article , says... Nonsense; the items in one's house are based on price not how elegantly it was produced. It makes no sense to honeycomb the inside of a knife handle as it would add no functionality and just increase the price. Lightweight metal silverware is a bit of a niche area, but there is an existing market. Titanium spork is a popular item for backpackers. It's insane how light those things are. Backpackers will spend big bucks to shave an ounce off of a piece of equipment. Jeff What do you think the market may be for 3D printed frizzens? -- Jim Pennino |
#40
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Towards the *fully* 3D-printed electric cars.
On Wed, 05 Jul 2017 11:08:21 -0700, Fred J. McCall
wrote: wrote: In sci.physics John Larkin wrote: There is one very successful additive manufacturing process: casting. Because it is fast and cheap. Good, fast, cheap - choose any two. It's obvious where the Chimp lives... Are you saying that castings are not good? |
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